cmdlet refactor

ProviderCore/base.py

@@ -636,6 +636,21 @@ class Provider(ABC):
         """True if tag writes should be deferred until after file ingest."""
         return False
 
+    @property
+    def supports_url_association(self) -> bool:
+        """True when this provider supports associating URLs to files."""
+        return False
+
+    @property
+    def supports_note_association(self) -> bool:
+        """True when this provider supports per-file named notes."""
+        return False
+
+    @property
+    def supports_relationship_association(self) -> bool:
+        """True when this provider supports file relationship links (king/alt/related)."""
+        return False
+
     def add_file(self, file_path: Path, **kwargs: Any) -> str:
         """Ingest a file and return its canonical hash."""
         raise NotImplementedError(f"Plugin '{self.name}' does not support add_file")